so my card whatt i buy this caard not working phone show me problem with MMI i check also on my girlfriend device s9 same problem MMI
maybe i need activate this card but i dont know how
Are you using a phone with multi-CSC? I tried the Thai SIM method on my S9 and it fails as well as it appears that SM-G9600/DS is not a multi-CSC enabled version.
You may try the method mentioned here to see if your phone is a multi-CSC: https://www.droidviews.com/how-to-change-csc-in-samsung-galaxy-phones/.